MH88622-5 Ver la hoja de datos (PDF) - Mitel Networks

Número de pieza

componentes Descripción

Fabricante

MH88622-5

DUAL OPS SLIC

Mitel Networks 

MH88622

®

DUAL OPS SLIC

Preliminary Information

Features

• Dual SLIC

• Ringing generation

• On-hook transmission

• Transformerless 2-4 wire conversion

• Constant current feed

• Battery Feed to the line

• Tip Ring reversal capability

• Over current protection

• Off-Hook detection

• Logic interface for SHK, RC, LR, ESE, LCS

• Metering injection

• Wide VBat operating range

• Minimum installation space

• ESE ramped output

Applications

• Pair Gain

• CT2

• Cordless local loops

ISSUE 3

April 1995

Ordering Information

MH88622 -1, -2, -3,-5 40 Pin SIL Package

0°C to 70°C

Description

The Mitel MH88622 is a Dual Subscriber Interface

Circuit which provides a complete interface between

the telephone lines a dual codec, requiring a dual rail

supply, battery and dc supply for ringing generation.

The functions provided by the MH88622 includes 2-4

Wire conversion, constant current line feed,

signalling and control. The SLIC manufactured using

thick film hybrid technology which offers high voltage

capability, reliability and high density resulting in a

significant area saving on the printed circuit board. A

complete C.O. type solution can be implemented

with minimal external components. Different variants

are provided to meet different country line

impedance, they are:

-1

220Ω + (820Ω // 115nF)

-2

600Ω

-3

370Ω + (620Ω // 310nF)

-5

200Ω + (680Ω // 100nF)

SHK1

LCS1

LCS2

SHK2

LR1

TIP1

RING1

VX1

VR1

ESI1

ESE1

Loop

Supervision

Line Drivers/

Feed

2-4 Wire

Conversion

Over Current

Protection &

Constant

Current Feed

Over Current

Protection &

Constant

Current Feed

Ring Generator

Loop

Supervision

Line Drivers/

Feed

2-4 Wire

Conversion

VDD VEE AGND VBat DCRI RC1 RF1 RF2 RGV RG1 RC2

Figure 1 - Functional Block Diagram

LR2

TIP2

RING2

VX2

VR2

ESI2

ESE2

2-173

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